--- product_id: 26770777 title: "SEAFLO 42 Series 12V RV Water Pump, 3.0 GPM 55 PSI, 4-Year Warranty, On-Demand Fresh Water Pressure Pump with Bypass, Self-Priming for RVs, Boats, Marine & Off-Grid Use, UL Listed" brand: "seaflo" price: "R3580" currency: ZAR in_stock: true category: "Seaflo" url: https://www.desertcart.co.za/products/26770777-seaflo-42-series-12v-rv-water-pump-3-0-gpm store_origin: ZA region: South Africa --- # 12V DC power efficiency 3.0 GPM steady flow 4-year industry-leading warranty SEAFLO 42 Series 12V RV Water Pump, 3.0 GPM 55 PSI, 4-Year Warranty, On-Demand Fresh Water Pressure Pump with Bypass, Self-Priming for RVs, Boats, Marine & Off-Grid Use, UL Listed **Brand:** seaflo **Price:** R3580 **Availability:** ✅ In Stock ## Summary > 🚿 Elevate your water game with SEAFLO’s powerhouse pump—never compromise on flow or reliability! ## Quick Answers - **What is this?** SEAFLO 42 Series 12V RV Water Pump, 3.0 GPM 55 PSI, 4-Year Warranty, On-Demand Fresh Water Pressure Pump with Bypass, Self-Priming for RVs, Boats, Marine & Off-Grid Use, UL Listed by seaflo - **How much does it cost?** R3580 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/26770777-seaflo-42-series-12v-rv-water-pump-3-0-gpm) ## Best For - seaflo enthusiasts ## Why This Product - Trusted seaflo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Reliable 12V Power:** Optimized for RV, marine & off-grid setups with efficient DC operation. - • **Consistent 3.0 GPM Flow:** Delivers smooth, on-demand water pressure at 55 PSI for multiple fixtures. - • **Whisper-Quiet Operation:** Internal bypass and vibration-dampening base ensure silent, smooth water delivery. - • **Plug & Play Installation:** Standard 1/2"-14 MNPT ports and mounting pattern for hassle-free integration. - • **Self-Priming & Run-Dry Safe:** Up to 6 ft self-priming with built-in protection for worry-free use. ## Overview The SEAFLO 42 Series 12V RV Water Pump offers a robust 3.0 GPM flow at 55 PSI, designed for continuous-duty use in RVs, boats, and off-grid systems. Featuring self-priming capability up to 6 feet, run-dry protection, and an internal bypass for smooth, quiet operation, it’s built with durable Santoprene diaphragms and EPDM valves. Backed by a 4-year warranty and certified for potable water, this UL-listed pump ensures safe, reliable freshwater delivery with easy installation using standard fittings. ## Description desertcart.com: SEAFLO 42 Series 12V RV Water Pump, 3.0 GPM 55 PSI, 4-Year Warranty, On-Demand Fresh Water Pressure Pump with Bypass, Self-Priming for RVs, Boats, Marine & Off-Grid Use, UL Listed : Automotive ## Features - [ SPECIFICATIONS ]: Model SFDP1-030-055-42 | Voltage 12V | 3.0 GPM (11.3 LPM) | 55 PSI | Max Draw 7.0A | Self-Priming 6 ft | EPDM Valves | Santoprene Diaphragm | Ports 1/2"-14 MNPT | 4-Year Warranty - [ 4-YEAR LIMITED WARRANTY ]: Backed by SEAFLO’s industry-leading 4-Year Warranty, ensuring durability, confidence, and long-term protection for freshwater systems in marine, RV, and off-grid installations. - [ CERTIFIED FOR POTABLE WATER SYSTEMS ]: Tested to NSF/ANSI/CAN 61 & 372 for safe drinking water contact and evaluated to NSF 24 and UL 778 performance standards, ensuring reliable operation in RV, marine, and off-grid pressurized water systems. - [ HIGH-PERFORMANCE CONTINUOUS-DUTY OPERATION ]: Built for extended runtime, this pump delivers consistent 3.0 GPM flow and 55 PSI pressure, making it ideal for marine, RV, and off-grid systems that demand long-lasting reliability. - [ SELF-PRIMING WITH RUN-DRY PROTECTION ]: Capable of self-priming up to 6 ft and safely running dry, the pump offers dependable performance during tank changes, low-water events, or installations requiring elevated mounting locations. - [ INTERNAL BYPASS FOR SMOOTH QUIET FLOW ]: Integrated bypass technology reduces short cycling and pressure fluctuations, producing smoother water delivery and quieter overall operation in on-demand freshwater systems. - [ DURABLE AND QUIET DESIGN ]: Santoprene diaphragm and EPDM valves provide long-term resistance to wear, while the rubber mounting base reduces vibration and noise for smoother, quieter operation in tight spaces. - [ EASY INSTALLATION WITH STANDARD MOUNTING PATTERN ]: Features an industry-standard mount footprint and 1/2"-14 MNPT ports, allowing simple integration with common plumbing layouts in RVs, boats, and tiny home water systems. - [ VERSATILE APPLICATIONS ACROSS MULTIPLE SYSTEMS ]: Ideal for pressurized water systems in RVs, boats, caravans, cabins, and agricultural setups, handling multiple fixtures with reliable performance and low maintenance needs. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01CQ7DD0S | | Best Sellers Rank | #3,535 in Automotive ( See Top 100 in Automotive ) #2 in RV Water Pumps & Accessories | | Brand Name | SEAFLO | | Color | Orange | | Customer Reviews | 4.4 4.4 out of 5 stars (2,263) | | Flow Rate | 3 gpm | | Included Components | 51S01 Filter, 51F01 Fitting | | Item Dimensions L x W x H | 7.96"L x 4.92"W x 4.37"H | | Item Weight | 4.8 pounds | | Manufacturer | SEAFLO | | Manufacturer Part Number | SFDP1-030-055-42 | | Material Type | Pump head: nylon. Pump head cover: PPS. Motor housing: polypropylene. Valves/seals: EPDM. Diaphragm: Santoprene | | Maximum Lifting Height | 6 feet | | Model Number | SFDP1-030-055-42 | | Number of Items | 1 | | Power Source | DC | | Product Style | 3.0 GPM - 55 PSI | | Specific Uses For Product | Marine, RV, Off-Grid | | UPC | 647336945584 715934427631 | | Voltage | 12 volts_of_direct_current | ## Product Details - **Brand:** SEAFLO - **Color:** Orange - **Item Weight:** 4.8 pounds - **Maximum Flow Rate:** 3 gpm - **Maximum Lifting Height:** 6 feet - **Power Source:** DC - **Product Dimensions:** 7.96"L x 4.92"W x 4.37"H - **Style:** 3.0 GPM - 55 PSI - **Voltage:** 12 volts_of_direct_current ## Images ![SEAFLO 42 Series 12V RV Water Pump, 3.0 GPM 55 PSI, 4-Year Warranty, On-Demand Fresh Water Pressure Pump with Bypass, Self-Priming for RVs, Boats, Marine & Off-Grid Use, UL Listed - Image 1](https://m.media-amazon.com/images/I/71GeYf5nuCL.jpg) ![SEAFLO 42 Series 12V RV Water Pump, 3.0 GPM 55 PSI, 4-Year Warranty, On-Demand Fresh Water Pressure Pump with Bypass, Self-Priming for RVs, Boats, Marine & Off-Grid Use, UL Listed - Image 2](https://m.media-amazon.com/images/I/81K7j8NvTwL.jpg) ![SEAFLO 42 Series 12V RV Water Pump, 3.0 GPM 55 PSI, 4-Year Warranty, On-Demand Fresh Water Pressure Pump with Bypass, Self-Priming for RVs, Boats, Marine & Off-Grid Use, UL Listed - Image 3](https://m.media-amazon.com/images/I/81WsZozt4FL.jpg) ![SEAFLO 42 Series 12V RV Water Pump, 3.0 GPM 55 PSI, 4-Year Warranty, On-Demand Fresh Water Pressure Pump with Bypass, Self-Priming for RVs, Boats, Marine & Off-Grid Use, UL Listed - Image 4](https://m.media-amazon.com/images/I/81+jvSwQZvL.jpg) ![SEAFLO 42 Series 12V RV Water Pump, 3.0 GPM 55 PSI, 4-Year Warranty, On-Demand Fresh Water Pressure Pump with Bypass, Self-Priming for RVs, Boats, Marine & Off-Grid Use, UL Listed - Image 5](https://m.media-amazon.com/images/I/81L8iMW0PrL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Lousy house pressure, if I connect outlet of garden faucet to inlet of this pump will I get better outlet pressure to drive an impact type sprinkler?** A: No it will not do anything for you... This is also 12V not 110 so maybe you should look into your houses old plumbing or contact city about your low water pressure **Q: Automatic shut off?** A: Yes it has a pressure switch that shuts it off when you shut the flow of water off **Q: What is the power usage for this motor? Amp hours would be best, but pretty much any measure would be helpful.** A: This is a 12V DC water pressure pump. The max amperage draw is 7.5 Amps. All technical specifications on the pump can be found here: http://seaflo.com/en-us/product/detail/609.html **Q: What is the wattage need when using a power supply** A: On the placard for the product that I bought, as well as in the product specs, the amperage is listed as 3.5A, with a maximum of 7.5A(presumably when the pump starts). Ohm’s law states that P=VI, so this yields an average of 12V*3.5A = 42W with a worst case of 12V*7.5A=90W. ## Frequently Bought Together - SEAFLO 42 Series 12V 3.0 GPM 55PSI Continuous Duty Diaphragm Pump with Bypass for Reduced Cycling, Fresh/Salt Water, 4-Year Warranty, UL & CSA Certified, Self-Priming for Marine, RV, Off-Grid, Boats - SEAFLO Accumulator Tank Water Pump Flow Control with Internal Bladder - 125 PSI, 23.5 oz (0.75 L) | Reduces Pump Cycling and Smooths Water Flow for Marine, RV, and Off-Grid Systems --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/26770777-seaflo-42-series-12v-rv-water-pump-3-0-gpm](https://www.desertcart.co.za/products/26770777-seaflo-42-series-12v-rv-water-pump-3-0-gpm) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-08-16*